Guidelines for the design of multiple roadway boulevards.

Part of a special section on street design. Multiple-roadway boulevard design is discussed. Designed to separate through traffic from local traffic, a multiple-roadway boulevard consists of a central roadway, which is generally four lanes wide and is employed for fast and nonlocal traffic, with tree-lined medians, access lanes, and walkways on either side. Following detailed study and design or redesign of six case-study streets, 16 design guidelines have been established to define in exact terms the essential qualities of well-designed boulevards. The guidelines cover such issues as public transportation, parking, lane widths, traffic controls, and bicycle lanes. Well-designed multiple-roadway boulevards are safer than and usually a large improvement over today's arterial roads, which cater only for fast-moving vehicular traffic.